Compact Photo-Pyroelectric Energy Harvester With High Energy Density and Rapid Discharge Speed.

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Micro-devices require advanced power solutions with remote self-powering, high energy density, and high power capability.
• Conventional pyroelectric energy harvesting faces limitations in energy and power densities.

Purpose of the Study:

• To develop a novel photo-pyroelectric energy harvester to overcome limitations of existing technologies.
• To enhance energy harvesting and storage capabilities for micro-devices.

Main Methods:

• Utilized poly(vinylidene difluoride-trifluoroethylene) P(VDF-TrFE) ferroelectric polymer.
• Incorporated nanostructured Au electrodes to induce photothermal effects and temperature oscillations under visible light.
• Investigated photo-capacitance effect in Au metallized polymer films.

Main Results:

• Achieved a highest energy density of 4.75 J cm^-3 and a highest power density of 1711.9 W cm^-3.
• Demonstrated a photo-capacitance effect as high as 281% in dielectric capacitors.
• Successfully combined pyroelectric energy harvesting and electrostatic energy storage in a single material.

Conclusions:

• The novel photo-pyroelectric energy harvester significantly surpasses existing technologies in energy and power densities.
• The material offers enhanced energy storage and power conditioning capabilities through light irradiation.
• This integrated approach provides a promising strategy for compact energy supply and power conditioning devices.